PNIO_MAINTENANCE_REQUIRED
PROFINET Maintenance Required Alarm
Phoenix Contact · AXC F 1050 Controller
What does PNIO_MAINTENANCE_REQUIRED mean?
This alarm indicates a low-priority maintenance requirement from at least one PROFINET device with an active connection. It suggests that a device needs attention, but not with the immediate urgency of a 'maintenance demanded' alarm. The specific device can be identified using the RALRM diagnostic block.
Common Causes
- A connected PROFINET device is signaling a low-priority 'maintenance required' alarm.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Utilize the RALRM diagnostic block in the application program to precisely identify the PROFINET device initiating the maintenance required alarm.
- 2
Consult the documentation for the identified PROFINET device to understand the specific cause of the maintenance required alarm.
- 3
Schedule and perform necessary maintenance actions on the identified PROFINET device.
Verified technical data. Last updated: March 2026
Related Faults
Source: Phoenix Contact AXC F 1050 Controller